回复 for no. 4 and 5

4 To reduce the glare caused by sun and the bar on the helmet.
5 Humanbeings tend to use right hand to do things and leave the left hand free to protect the heart in case of the emergency.

所有跟帖： 

• 回复：回复 for no. 4 and 5 -waikatolam- ♀ (128 bytes) () 12/15/2003 postreply 04:16:00

• #4 correct; #5 I don't know -不是才子莫吟诗- ♀ (230 bytes) () 12/15/2003 postreply 10:25:00

• #5 should have been #7 -yma16- ♀ (392 bytes) () 12/15/2003 postreply 18:11:00